Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Engine Oil Pressure Sensor Signal Circuit | 1 | P0520 | P0520 | -- |
Engine Oil Pressure Sensor Ground Circuit | -- | P0520 | -- | -- |
1. Engine Oil Pressure Indicator Always On |
The engine oil pressure (EOP) switch is a normally closed switch that opens with the proper oil pressure. With the ignition switch turned ON and the engine not running, the engine control module (ECM) or the powertrain control module (PCM) should detect a low signal voltage input. With the engine running, the pressure switch opens, and the ECM/PCM should detect a high signal voltage input. The ECM/PCM tests the state of the EOP circuit with the ignition switch turned ON, and the engine turned OFF. If the ECM/PCM detects a high voltage input on the EOP signal circuit, DTC P1189 will set.
• | Engine Controls Schematics for the 2.0L engine. |
• | Engine Controls Schematics for the 2.2L engine. |
• | Engine Controls Schematics for the 2.4L engine. |
• | Powertrain Control Module Connector End Views for the 2.0L engine. |
• | Engine Control Module Connector End Views for the 2.2L engine. |
• | Engine Control Module Connector End Views for the 2.4L engine. |
Important: Do not turn the key to the crank position or engage the starter at any time during diagnosis.
⇒ | If not Low, replace the instrument panel cluster (IPC). |
⇒ | If not OK, test the signal circuit of the EOP switch for a short to ground. If the circuit tests normal, replace the ECM. |
⇒ | If OK, replace the EOP switch. |
Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Engine Oil Pressure Sensor and/or Switch Replacement for the 2.0L |
• | Engine Oil Pressure Sensor and/or Switch Replacement for the 2.2L engine |
• | Engine Oil Pressure Sensor and/or Switch Replacement for the 2.4L engine |
• | Control Module References for the ECM/PCM and IPC replacement, setup, and programming |